Proportion Calculator
Solve proportion problems using cross multiplication. Enter three values and find the missing fourth.
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Enter three values, leave one empty to solve:
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How to Solve Proportions
A proportion states that two ratios are equal: A/B = C/D. Use cross multiplication (A*D = B*C) to find any missing value.
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Disclaimer: This tool is provided as-is for informational and educational purposes only.